c1571 dumping settings for .D71 creating

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wizb0y
Posts: 4
Joined: Thu Oct 03, 2013 8:44 pm

c1571 dumping settings for .D71 creating

Post by wizb0y »

Hi,

i have a couple of floppies that are created on a 1571 with a C128.
How can i dump these so they can work on vice C128?
i"ve tried a couple of parameters, but i keep getting 2 files instead of one.
Can someone help me?

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IFW
Posts: 3079
Joined: Mon Nov 08, 2010 2:42 pm

Re: c1571 dumping settings for .D71 creating

Post by IFW »

Yes, someone did that before, so it works - I asked him to post here the correct parameters.

RJMcInty
Posts: 81
Joined: Fri Nov 26, 2010 12:26 am

Re: c1571 dumping settings for .D71 creating

Post by RJMcInty »

I worked with you on the 1581 settings, and the additional parameters are:

-oo4

So, assuming a file input, it would be something like this:

dtc -m1 -finput -i0 -foutput.d81 -oo4 -i4 -l8

Not sure that this will work with a 1571, though.

Cheers!
Robert

wizb0y
Posts: 4
Joined: Thu Oct 03, 2013 8:44 pm

Re: c1571 dumping settings for .D71 creating

Post by wizb0y »

I Found a solution, but it would be great if the format is supported by DTC:

tried: dtc -m1 -fdump\cpm00 -i0 -foutput.d81 -oo4 -i6 -l8

output:
00.0 : MFM: <unformatted>
00.1 : MFM: <unformatted>
01.0 : MFM: <unformatted>
01.1 : MFM: <unformatted>
02.0 : MFM: <unformatted>
02.1 : MFM: <unformatted>
03.0 : MFM: <unformatted>
03.1 : MFM: <unformatted>
04.0 : MFM: <unformatted>
04.1 : MFM: <unformatted>
05.0 : MFM: <unformatted>
05.1 : MFM: <unformatted>
06.0 : MFM: <unformatted>
06.1 : MFM: <unformatted>
07.0 : MFM: <unformatted>
07.1 : MFM: <unformatted>
08.0 : MFM: <unformatted>
08.1 : MFM: <unformatted>
09.0 : MFM: <unformatted>
...
this is correct because a 1571 drive is using the GCR format (my floppy tested here is CP/M, and must be GCR), like a 1541 does.
MFM can be used, but with special commands to format it, or by formatting it under CP/M

if i try: dtc -m1 -fdump\cpm00 -i0 -foutput.d81 -oo4 -i6 -l8

i only get a half of the image. (Side 0)

The solution is to combine the resulting disk dumps of side 0 and 1:
dtc -l8 -t10 -dd1 -fdisk.d64 -g2 -i6
copy /b disk_s0.d64+disk_S1.d64 disk.d71

disk.d71 is now usable in c128 emulation.

Please add 1571 floppy format to DTC:
xx : CBM GCR image, DS, DD, 300, GCR

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